General Motors is doing many things different with its Ultium battery and propulsion strategy, which will underpin the GMC Hummer EV first, and then a diversity of electric vehicles from Cadillac, Chevrolet, and Buick—plus Honda and Nikola—by the middle of the decade. One of them is its battery management system, which GM said…General Motors is doing many things different with its Ultium battery and propulsion strategy, which will underpin the GMC Hummer EV first, and then a diversity of electric vehicles from Cadillac, Chevrolet, and Buick—plus Honda and Nikola—by the middle of the decade. One of them is its battery management system, which GM said…General Motors is doing many things different with its Ultium battery and propulsion strategy, which will underpin the GMC Hummer EV first, and then a diversity of electric vehicles from Cadillac, Chevrolet, and Buick—plus Honda and Nikola—by the middle of the decade. One of them is its battery management system, which GM said…General Motors is doing many things different with its Ultium battery and propulsion strategy, which will underpin the GMC Hummer EV first, and then a diversity of electric vehicles from Cadillac, Chevrolet, and Buick—plus Honda and Nikola—by the middle of the decade. One of them is its battery management system, which GM said…